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Figure 2<br />

Stereo view of the sixty propane minima (thick lines) obtained with the modified force<br />

field (see text) on the surface of the A peptide chain (medium lines) of the GCN4 leucine<br />

zipper (PDB code 2ZTA). Although the B peptide chain was removed during the MCSS<br />

procedure, its backbone and hydrophobic side chains are also drawn (thin lines) to show<br />

how the propane minima match the aliphatic groups of chain B. Hydrophobic residues<br />

are labeled at their C α atom.Five clusters of propane minima that do not match the<br />

hydrophobic side chain of the B helix involved in the interhelical interactions are<br />

labeled from A (top right) to E (bottom center) and discussed in the text.<br />

http://legacy.netlibrary.com/nlreader/nlReader.dll?bookid=12640&filename=Page_546.html (2 of 2) [4/9/2004 12:51:45 AM]

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